Augustus thayer



'Quinn faire atrnt ffice.,

Letters Patent No. 78,7731, dated June 9, 1868.

IMPROVED IMPLEMNT FOR SHARPENING GUTLERY.

digg tlgrmle munt u it tigen' tdtettntnrt nu making met mf ilgt samt.

TO ALL WHOM I'l MAY CONCERN:

Be it known that I, AUGUSTUS THAYER, ot' Albany', in the county of Albany, and State of' New York, have inventeda, new and improved Implement for Sharpening Cutlery and I do hereby declare that vthe following is a. full, clear, and exact description thereof, which v`.vill enable those skilled in the art to make and. use the same, reference being had to the accompanying drawings, forming part of this specication.

This invention relates to a. new and improvedl device forvsharpening cutlery, and is more especially designed for sharpening tableLcutlery, scissors, pocket-knives,'&c., but it may be `used for sharpening cutlery of various kinds.

In the accompanying sheethof'drawings- Figure l is an external View of my invention complete.. Figure 2, an external view of o; portion of the same,showing a different portion of the device. Figure 3, a longitudinal section of the sume, taken in the line x x, g. 2. Figure 4, a transverse section of the same, taken in the line y y, iig. 2. Similar letters of reference indicate corresponding parts. A represents a handle, which may be constructed of wood or other suitable material, and has a metallic tang, B, secured in one end of it, said tang extending beyond. the end of the handle, and having an opening orA slot made' transversely through it, in which the steel cutters C C are placed, and secured in position by ascrew, a, cut on the end of an ordinarysteel, D, such as is used for sharpening knives,y (see more particularly fig. 3,)

or a. wedge'may be used for securing the cutters in position. The cutters C C are bevelled at each side of their` ends to form angular or Vfshaped grooves, 6, through which the cutting-edge of the knife is drawn, and'the steel at each side taken or cut away thereby; These grooves vary in width by having the bevels at one end of Athe cutters more oblique than those at the other end, in order to suit blades of different thicknesses, and the di`erent vgrooves may be used in succession, if necessary, in orderto bring the blade of the knife to a proper cutting-edge.

The outer grooves b', between the cutters and the shoulders c of the tang, have a less bevel, and' at one side only, so that these grooves take off 'the metal at one side of the blade only, andhence, when one side of the blade lis thus operatedupori, it must be drawn through the other groove, b, t0 have the other side taken o, (see tig. 3.) p

The grooves b o", at the opposite ends of the cutters, are used for sharpening or hardening Vand burnishing scissors, and the shoulders c are bevelled, sothatthe cutting-edge of the scissors may be properly presented to the cutters.

The two cutters C C, as formed, make sixteen or more different cutting-hedges, and fourdi'erent bevels,

without changing their position.

I do not confine myself to any particular number .of cutters C. Two or more may be used, and one end of the cutters, or both ends, if necessary o r desired, may have small grooves, d, made in them, to serve the purpose Aof burnishers to harden the cutting-edge of a knife after being sharpened, the cutting-edge being drawn through said grooves, itbeing well known that the burnishing of the emitting-edge of a knife renders it far more durable or lasting than it otherwise would be.

The steel, D, may be used for putting a iinishingledge on'the knife.

The cutters C-C maybe covered by a tube, E, (see tig. 1,) so constructed that it may be readily shovedA over and off from them.

The outer end of the tube E is provided with a polygonal plate, e, which is designed to prevent the device.

from rolling o' from a table. i

It'` the tube'E ,be not used, a polygonal pla-te, eX, may be interposed between the outer end of the tang, B, and a shoulder,j`, at the innerend of the steel, (see-tig. 3.)

I claim as new, and desire to secure by Letters Patent#- 1. The cutters C, two or more, constructed es shown, with bevelled ends, and tted in a slot in a tong, B, and secu'red'therein by a. screw or wedge, substantially-Vas und for the purpose set forth;

g2.' The groovesd inthe ends of the cutters, for burnishing oi' hardening the cutting-edges, substantially .as set forth. l

3. The hevelled shoulders c, n combination with the cutters @substantially as and for the purpose specified. 4, The sliding or adjustable t'uhelE, either with or without the polygonal plate F,.substa.ntia.lly-as and for the purpose set forth.

AUGUSTUS THAYER. Witnesses:

WM'. F. MCNAMARA, ALELF. RoBFlRT's. 

